body {
    background-color: #979797;
}

div {
    overflow: hidden;
}

.cl {
    clear: both;
}

.wrapper {
    width: 98%;
    background-color: #fff222;
    margin:0 auto; /* 水平居中 */
}

.header {
    width: 100%;
    background-color: #929aff;
    margin: 0 auto;
    min-height: 200px;
}

.main {
    width: 100%;
    background-color: #ffffff;
    margin: 0 auto;
}

.footer {
    width: 100%;
    background-color: #c7ff92;
    margin: 0 auto;
    min-height: 100px;
}

.sidebar {
    float: left;
    width: 189px;
    min-height: 600px;
    background-color: #ff77bb;
    padding-left: 10px;
    border-right: 1px dashed #fff222;
}

.content {
    /* float: left; */
    width: auto;
    min-height: 600px;
    background-color: #15ffff;
    margin-left: 205px; /*sidebar 200px + 设计两个div间的间距5px*/
}